Ron can play SF as long as Earl is out there with him. Then you have 2 guys that are interchangeable when it comes to guarding the 3-4 positions. Earl being out there also makes our P n R defense a lot better. The one thing I want to see from Earl (especially if he is going to be playing heavy mins at the 4) is for him to work on his defensive rebounding/boxing out. He has to be able to hold his own in that category.
But as everyone else is saying, a front court of Ron-Earl-Dwight is pretty damn good. Solid on ball defense, good athleticism and the best defensive center in the league. We have long had trouble defending the p n r but this trio may actually end that nonsense.